MATLAB Programming

Function Arguments
• addParamValue — Add an optional parameter-value pair to the schema
Creating the inputParser Object. Call the class constructor for
inputParser to create an instance of the class. This class instance, or object,
gives you access to all of the methods and properties of the class.
Begin writing the example publish_ip M-file by entering the following two
statements:
function x = publish_ip(script, varargin)
p = inputParser; % Create an instance of the class.
After calling the constructor, use the addRequired, addOptional, and
addParamValue methods to add arguments to the schema.
Note The constructor and all methods and properties of the inputParser
class are case sensitive.
Adding Arguments to the Schema. Add any required arguments to the
schema using the addRequired method. This method takes two inputs: the
name of the required parameter, and an optional handle to a function that
validates the parameter:
addRequired(name, validator);
Put an addRequired statement at the end of your publish_ip code. The two
arguments for addRequired in this case are the filename input, script, anda
handle to a function that will validate the filename, ischar. Afteraddingthe
addRequired statement, your publish_ip function should now look like this:
function x = publish_ip(script, varargin)
p = inputParser; % Create an instance of the class.
p.addRequired('script', @ischar);
Use the addOptional method to add any arguments that are not required.
The syntax for addOptional is similar to that of addRequired except that
youalsoneedtospecifyadefaultvaluetobeusedwhenevertheoptional
argument is not passed:
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